/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
 * Copyright (C) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
 * Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org>
 * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
 * 
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
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 * use your version of this file under the terms of the CPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
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 ***** END LICENSE BLOCK *****/
package org.jruby.internal.runtime.methods;

import org.jruby.RubyModule;
import org.jruby.runtime.Arity;
import org.jruby.runtime.Block;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;

/**
 *
 * @author  jpetersen
 */
public class AliasMethod extends DynamicMethod {
    private DynamicMethod oldMethod;
    private String oldName;

    /*
     * This code used to try and optimize the case of when oldMethod is an aliasMethod.
     * This seems a little overkill.
     */

    public AliasMethod(RubyModule implementationClass, DynamicMethod oldMethod, String oldName) {
        super(implementationClass, oldMethod.getVisibility());

        this.oldName = oldName;
        this.oldMethod = oldMethod;
    }

    public void preMethod(ThreadContext context, RubyModule clazz, IRubyObject self, String name, IRubyObject[] args, boolean noSuper, Block block) {
    }

    public void postMethod(ThreadContext context) {
    }

    public IRubyObject internalCall(ThreadContext context, RubyModule clazz, IRubyObject self, String name, IRubyObject[] args, boolean noSuper, Block block) {
        assert false;
        return null;
    }
    
    public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject[] args, boolean noSuper, Block block) {
        return oldMethod.call(context, self, clazz, oldName, args, noSuper, block);
    }

    public DynamicMethod dup() {
        return new AliasMethod(implementationClass, oldMethod, oldName);
    }

    public Arity getArity(){
        return oldMethod.getArity();
    }
}
